Improvement in fire-extinguishers



UNITED STATES PATENT QEEICE Y G'EOEGE BOOTH, OE TORONTO, CANADA.

IMPROVEMENT IN` FIRE-EXTINGUISHERS.

Specification forming part of Letters Patent No. 144,595, dated November 18, 1873; application filed i September 1, 1873.

a-lly sealed by a nozzle-cap, secured Within a screwed cap; also, a peculiarlyshaped and placed knife for tearing open or splitting the nozzle-cap before mentioned, and as hereafter described.

i A is a glass pot having a iiange, a, on one end of it. B is a section of the outside of the reservoir. C is a seat for supporting A. D

lis a cap screwed onto C, and forming a cover over A for holding it in its place. E is a noz zie-cap. made of lead or other suitable matel rial, held in its place by the cap F. G is a hook-shaped piercer or knife on the end of the spindle H, which spindle passes through the reservoir B, as illustrated.

The pot or bottle A is filled with the requisite acid, and is hermetically sealed by the nozzle-cap E, screwed down by the cap F. The pot is then put into its place Within the reservoir B, as shown, and screwed down onto its seat C by the cover or cap D. When the pot or bottle is A thus put into position the Washer E is immediately over the hook-shaped knife G, Which knife Gr, When the spindle H is made to revolve, will split or rip open the said nozzle-oap E.

Where the spindle H passes the reservoir B a stuffing-box, J, and cap K are placed. This stuffing-box, besides serving its ordinary purpose, also furnishes a long bearing for the spindle H, and acts as a stop against which the collar h on the spindle H is held by the cap K. This collar prevents the spindle H from slipping` into or out of the reservoir B, the piercer G by this means being always held beneath the nozzle-cap E.

I am aware that there is nothing new in a hermetically-sealed acid' pot or bottle for iireextinguishers, as many of that kind are in use; but the objection to all of them is that they are utterly destroyed when they are used, and

must each be specially charged and sealed before they are delivered for use; consequently,

it is necessary for each extinguisher to be supplied With a niunber of pots already charged, and the machine, when its full complement of pots or bottles have been destroyed, is of lno use until a fresh supply has been obtained from the factory.

In my invention the nozzle-cap or washer E is the only part destroyed; therefore, only a limited number of pots need be supplied with each machine, as these, When emptied, can be refilled by the party iny possession of the ex tinguisher.

I place no handle on the end of the spindle `H, so that it cannot be turned Without a Wrench specially made for it, which Wrench .ought al Ways be kept by the owner or party in charge GEORGE BOOTH.

Witnesses WM. SHEPPAED, HUGH AIRD. 

